Adjustable end milling cutter

Abstract

The present invention relates to the technical field of milling cutters, and in particular to an adjustable end milling cutter, comprising a cutter seat and a blade, the cutter seat comprising an upper cutter seat and a lower cutter seat, the blade being arranged inside the lower cutter seat, the bottom circumferential array of the lower cutter seat being provided with four receiving grooves, the number of mounting blocks being four, and being respectively arranged inside the four receiving grooves, the blade being connected to the lower cutter seat through the mounting blocks, and a built-in groove being arranged at the inner center position of the lower cutter seat. The present invention installs the blade on the mounting block, and the mounting block can be driven to move by a driving mechanism, so as to facilitate adjustment of the extension length of the blade, and thus facilitate adaptation to different use environments, and the movement of the four blades is kept synchronous, and no separate adjustment is required, so as to facilitate operation, and the movement of the mounting block can cooperate with the trapezoidal block, so as to facilitate installation and removal of the blade, and improve the convenience of operation.

Description

Technical Field

[0001] The invention relates to the technical field of milling cutters, in particular to an adjustable end milling cutter. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. During operation, each tooth cuts off the excess of the workpiece in turn and intermittently. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines. End mills are milling cutters that process the top surface. They are disc-shaped and can only be cut with the blade on the end surface.

[0003] When using an end mill, the blade needs to be installed on a tool holder, and the tool holder needs to be installed on a tool rod. Generally, the tool holder needs to be installed with multiple blades for use. During installation, the blade needs to be fixed to the side wall of the tool holder with bolts, and the multiple blades are arranged in a circular array to facilitate cutting. However, the blade is directly installed on the tool holder with bolts, which is a fixed connection. During use, the extended length of the blade cannot be adjusted according to actual use requirements. Moreover, the blade is easily fallen off when it is directly fixed with bolts, and the stability is poor. In addition, when the blade needs to be removed, the blade may be stuck in the holder, resulting in many inconveniences and inconveniences in actual use. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable end mill, which solves the problem that the blade is directly installed with the tool holder by bolts in the prior art, which is a fixed connection. During use, the extension length of the blade cannot be adjusted according to actual use requirements. The blade is directly fixed with bolts and is prone to falling off, and the stability is poor. When the blade needs to be removed, the blade may be stuck in the holder, resulting in many inconveniences in actual use.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an adjustable end mill and an adjustable assembly structure thereof, comprising a tool holder and a blade, the tool holder comprising an upper tool holder and a lower tool holder, the blade being arranged inside the lower tool holder;

[0006] The bottom circumference array of the lower knife seat is provided with four receiving grooves, the mounting blocks are arranged inside the receiving grooves, and the blade is connected to the lower knife seat through the mounting blocks;

[0007] A built-in groove is specifically provided at the inner center of the lower knife seat, and a driving mechanism is specifically arranged inside the built-in groove. The driving mechanism specifically includes a screw rod, which is rotatably connected to the inside of the four receiving grooves respectively. The screw rod thread penetrates the mounting block specifically, and the mounting block is slidably connected to the receiving groove specifically.

[0008] The auxiliary mechanism is placed in the lower knife seat; the auxiliary mechanism specifically includes a slide rod, which is arranged in a circular array inside the lower knife seat and is slidably connected to the lower knife seat, and both ends of the slide rod are respectively inserted into the built-in groove and the accommodating groove.

[0009] Specifically, a positioning block is fixedly installed at the bottom of the upper knife seat, a bolt is arranged on the surface of the upper knife seat relative to the positioning block, and a positioning groove and a threaded hole are arranged on the top of the lower knife seat relative to the positioning block.

[0010] Specifically, a slot is provided on the side wall of the mounting block, a blade is inserted into the slot, a mounting hole is provided on the top wall of the slot, a limiting slot is provided on the top of the blade, a limiting block matching the size of the limiting slot is slidably connected inside the mounting hole, a tower spring is fixedly installed on the top wall of the mounting hole, and the bottom end of the tower spring is fixedly connected to the limiting block.

[0011] Specifically, the driving mechanism also includes four second bevel gears, which are respectively fixedly mounted on one end of the screw rod close to the built-in groove. A sleeve is arranged inside the built-in groove, a first bevel gear is fixedly mounted on the top of the sleeve, the first bevel gear and the second bevel gear are meshed, a first rotating seat is fixedly mounted on the bottom end of the sleeve, a hexagonal groove is provided at the bottom of the first rotating seat, a hexagonal sleeve block is fixedly mounted inside the hexagonal groove, and a circular hole is provided at the bottom center of the lower tool seat.

[0012] Specifically, a first limiting ring is provided inside the hexagonal groove, a spring is fixedly installed on the top of the first limiting ring, the top of the spring is fixedly connected to the hexagonal groove, a first limiting protrusion is installed in a circular array at the bottom of the first limiting ring, the inside of the hexagonal groove is set as a circular structure, and the circular diameter size is larger than the size of the hexagonal groove, the first limiting protrusion slides through the bottom of the hexagonal groove, a placement groove is opened at the bottom center position of the built-in groove, the first rotating seat is arranged inside the placement groove, and a first limiting groove that is adapted to the size of the first limiting protrusion is opened in a circular array on the surface of the placement groove, and the inner wall of the first limiting ring fits the hexagonal sleeve block.

[0013] Specifically, the auxiliary mechanism also includes a conical block, which is slidably sleeved on the surface of the sleeve, and a screw is rotatably connected inside the sleeve, and the screw thread passes through the conical block. A circular groove is opened inside the first rotating seat, and a second rotating seat is arranged inside the circular groove. A connecting sleeve is fixedly installed on the top of the second rotating seat, and the connecting sleeve movably passes through the top of the circular groove. The connecting sleeve and the screw are slidably connected, and a "cross"-shaped blade is opened at the bottom of the second rotating seat. A through hole matching the size of the sliding rod is opened on the side wall of the mounting block, and a steel ball is movably connected to the end of the sliding rod located in the built-in groove.

[0014] Specifically, a spring piece is fixedly mounted on the top of the second rotating seat, a second limiting protrusion is arranged in a circumferential array at the bottom of the second rotating seat, and a second limiting groove matching the size of the second limiting protrusion is opened on the bottom wall of the circular groove.

[0015] Specifically, a vertical hole is opened at the center position of the conical block, a "cross" shaped connecting rod is fixedly installed inside the vertical hole, the screw thread penetrates the connecting rod, and a vertical groove matching the size of the connecting rod is opened on the surface of the sleeve to achieve a state in which the conical block moves vertically on the surface of the sleeve under the drive of the screw.

[0016] Specifically, a reserved groove is opened on the side wall of the limiting block, a through hole is opened on the side wall of the mounting block, a trapezoidal block is fixedly installed inside the accommodating groove, the trapezoidal block and the through hole are of the same height and have matching sizes, and the inclined surface of the trapezoidal block faces upward so that the limiting block can be pushed upward when the trapezoidal block passes through the through hole and is inserted into the reserved groove.

[0017] Specifically, a positioning hole matching the size of the sleeve is opened at the center of the bottom of the upper knife seat.

[0018] The present invention has at least the following beneficial effects:

[0019] 1) By installing the blade on the mounting block, the driving mechanism can be used to drive the mounting block to move, so as to facilitate the adjustment of the extension length of the blade, thereby facilitating the adaptation to different use environments. Moreover, the movement of the four blades is kept synchronous, and no separate adjustment is required, which is convenient for operation. Moreover, the movement of the mounting block can cooperate with the trapezoidal block, which is convenient for the installation and removal of the blade, and improves the convenience of operation;

[0020] 2) By setting up the auxiliary mechanism, the slide bar in the auxiliary mechanism can be used to tighten the blade after it is installed and fixed, thereby improving the stability of the blade during use and preventing the blade from shaking due to deformation of the internal space caused by long-term use after the blade is installed in the mounting block, thereby improving functionality. In addition, the slide bar can also push the blade out from the inside of the mounting block when the blade is removed, thereby improving functionality;

[0021] 3) By setting the first rotating seat and the second rotating seat, the adjustment operation can be performed using a suitable screwdriver, and it also has a self-locking function, so that after the blade position is adjusted, the position of the blade can be maintained, so that the blade will not be easily displaced, thereby improving the stability of the blade during processing and improving the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2For the present invention Figure 1 Bottom structure diagram;

[0025] Figure 3 For the present invention Figure 1 Disassembly diagram;

[0026] Figure 4 It is a cross-sectional view of the lower knife seat of the present invention;

[0027] Figure 5 This is a schematic diagram of the blade structure of the present invention;

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle;

[0029] Figure 7 It is a schematic diagram of the sliding rod structure of the present invention;

[0030] Figure 8 It is a cross-sectional view of the first rotating seat of the present invention;

[0031] Fig. 9 This is a schematic diagram of the hexagonal slot structure of the present invention;

[0032] Fig.10 It is a schematic diagram of the sleeve structure of the present invention;

[0033] Fig.11 This is a schematic diagram of the placement slot structure of the present invention.

[0034] In the figure: 1, upper knife seat; 11, positioning block; 12, bolt; 2, lower knife seat; 21, positioning groove; 22, receiving groove; 23, placement groove; 24, built-in groove; 25, round hole; 3, blade; 31, limiting groove; 4, mounting block; 41, tower spring; 42, limiting block; 43, reserved groove; 44, mounting hole; 45, through hole; 6, driving mechanism; 61, first bevel gear; 62, sleeve; 63, first A rotating seat; 631, a hexagonal sleeve block; 64, a first limiting ring; 641, a first limiting protrusion; 65, a spring; 66, a second bevel gear; 67, a screw; 68, a hexagonal groove; 69, a circular groove; 7, an auxiliary mechanism; 71, a screw; 72, a conical block; 73, a second rotating seat; 731, a second limiting protrusion; 74, a spring; 75, a connecting sleeve; 76, a sliding rod; 77, a steel ball; 8, a trapezoidal block. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example, see Figure 1-11 , an adjustable end milling cutter, comprising a cutter seat and a blade 3, wherein the cutter seat comprises an upper cutter seat 1 and a lower cutter seat 2, and the blade 3 is arranged inside the lower cutter seat 2;

[0038] The bottom circumferential array of the lower blade seat 2 is provided with four receiving grooves 22, the mounting block 4 is arranged inside the receiving groove 22, and the blade 3 is connected to the lower blade seat 2 through the mounting block 4;

[0039] A built-in groove 24 is provided at the inner center of the lower knife seat 2, and the driving mechanism 6 is arranged inside the built-in groove 24. The driving mechanism 6 includes a screw rod 67, and the screw rod 67 is rotatably connected to the inside of the four receiving grooves 22 respectively. The screw rod 67 is threaded through the mounting block 4, and the mounting block 4 is slidably connected to the receiving groove 22.

[0040] The auxiliary mechanism 7 includes a slide bar 76 , which is arranged in a circular array inside the lower knife seat 2 and is slidably connected to the lower knife seat 2 , and both ends of the slide bar 76 are respectively inserted into the built-in groove 24 and the accommodating groove 22 .

[0041] During use, the blade 3 is inserted into the mounting block 4 for fixing, and then the mounting block 4 is driven to move inside the accommodating groove 22 by rotating the screw rod 67 in the driving mechanism 6, and the position of the mounting block 4 in the lower blade seat 2 can be adjusted, thereby achieving the purpose of synchronously adjusting the position of the blade 3 to adapt to different usage environments. At the same time, the sliding rod 76 in the auxiliary mechanism 7 can be used to press the blade 3 against the mounting block 4, which can assist the blade 3 in being tightened and installed, thereby improving the stability of the blade 3 after installation. The blade seat is divided into an upper blade seat 1 and a lower blade seat 2. After disassembling the upper blade seat 1, the internal environment of the lower blade seat 2 can be directly exposed, which is convenient for maintenance operations.

[0042] Specifically, a positioning block 11 is fixedly installed on the bottom of the upper tool seat 1, and a bolt 12 is provided on the surface of the upper tool seat 1 relative to the position of the positioning block 11. A positioning groove 21 and a threaded hole are provided on the top of the lower tool seat 2 relative to the position of the positioning block 11. The upper tool seat 1 and the lower tool seat 2 can be connected by first utilizing the cooperation between the positioning block 11 and the positioning groove 21, and then fastened by utilizing the bolt 12 and the threaded hole. A sleeve rod connected to the tool rod is provided at the top of the upper tool seat 1. After the tool rod transmits the torque to the upper tool seat 1, the upper tool seat 1 can utilize the positioning block 11 to transmit the torque to the lower tool seat 2, thereby avoiding the situation where the bolt 12 is damaged or inconvenient to disassemble due to the force.

[0043] Specifically, a slot is provided on the side wall of the mounting block 4, and the blade 3 is inserted into the slot. A mounting hole 44 is provided on the top wall of the slot. A limiting slot 31 is provided on the top of the blade 3. A limiting block 42 whose size matches that of the limiting slot 31 is slidably connected inside the mounting hole 44. A tower spring 41 is fixedly installed on the top wall of the mounting hole 44. The bottom end of the tower spring 41 is fixedly connected to the limiting block 42. When installing the blade 3, the mounting block 4 is first moved to the outermost side by the driving mechanism 6, and then the blade 3 is inserted into the slot of the mounting block 4. Then, the limiting block 42 in the slot is stuck in the limiting slot 31 at the top of the blade 3. The tower spring 41 can be used to stably limit the limiting block 42 in the limiting slot 31, thereby achieving fixation between the blade 3 and the mounting block 4, and then the position of the blade 3 can be adjusted when the position of the mounting block 4 is adjusted.

[0044] Specifically, the driving mechanism 6 also includes four second bevel gears 66, which are respectively fixedly mounted on one end of the screw rod 67 close to the built-in groove 24, a sleeve 62 is arranged inside the built-in groove 24, a first bevel gear 61 is fixedly mounted on the top of the sleeve 62, the first bevel gear 61 is meshed with the second bevel gear 66, a first rotating seat 63 is fixedly mounted on the bottom end of the sleeve 62, a hexagonal groove 68 is provided at the bottom of the first rotating seat 63, a hexagonal sleeve block 631 is fixedly mounted inside the hexagonal groove 68, a circular hole 25 is provided at the bottom center of the lower knife seat 2, and the driving mechanism 6 During use, first use the hexagonal sleeve 62 to insert it into the circular hole 25 of the lower knife seat 2, and then insert it into the hexagonal groove 68 through the circular hole 25, and then rotate the hexagonal sleeve 62, the hexagonal sleeve 62 will drive the hexagonal sleeve block 631 and the first rotating seat 63 to rotate, the first rotating seat 63 will drive the sleeve 62 to rotate, the sleeve 62 will drive the first bevel gear 61 to rotate, the first bevel gear 61 drives the four second bevel gears 66 to rotate, thereby driving the four screw rods 67 to rotate, and then driving the four mounting blocks 4 to move synchronously, so as to achieve the purpose of adjusting the position of the blade 3.

[0045] Specifically, a first limiting ring 64 is provided inside the hexagonal groove 68, a spring 65 is fixedly installed on the top of the first limiting ring 64, the top of the spring 65 is fixedly connected to the hexagonal groove 68, a first limiting protrusion 641 is installed in a circumferential array at the bottom of the first limiting ring 64, the inside of the hexagonal groove 68 is set as a circular structure, and the circular diameter size is larger than the size of the hexagonal groove 68, the first limiting protrusion 641 slides through the bottom of the hexagonal groove 68, a placement groove 23 is provided at the bottom center position of the built-in groove 24, a first rotating seat 63 is provided inside the placement groove 23, a first limiting groove matching the size of the first limiting protrusion 641 is provided on the surface circumferential array of the placement groove 23, the inner wall of the first limiting ring 64 is fitted with the hexagonal sleeve block 631, and the first limiting ring 64 is provided inside the hexagonal groove 68, so that the hexagonal sleeve 62 is inserted into the hexagonal groove 68 When the screw rod 67 is not needed, that is, when the mounting block 4 and the blade 3 need to be kept in a fixed position, the first limiting ring 64 will be located at the bottom of the hexagonal groove 68 under the action of the spring 65, so that the first limiting protrusion 641 at the bottom of the first limiting ring 64 is inserted into the first limiting groove on the surface of the placement groove 23, and the first rotating seat 63 is restricted in the placement groove 23 by the first limiting protrusion 641 and the first limiting ring 64, so that it cannot rotate easily, thereby achieving the purpose of self-locking, so that the screw rod 67 will not rotate, so that the mounting block 4 remains in a fixed position, and the stability of the cutting process of the blade 3 is improved.

[0046] Specifically, the auxiliary mechanism 7 also includes a tapered block 72, which is slidably sleeved on the surface of the sleeve 62, and the sleeve 62 is rotatably connected with a screw 71 inside, and the screw 71 threadedly penetrates the tapered block 72, a circular groove 69 is provided inside the first rotating seat 63, and a second rotating seat 73 is provided inside the circular groove 69, and a connecting sleeve 75 is fixedly installed on the top of the second rotating seat 73, and the connecting sleeve 75 movably penetrates the top of the circular groove 69, and the connecting sleeve 75 and the screw 71 are slidably connected, and a "cross"-shaped blade is provided at the bottom of the second rotating seat 73, and a through hole matching the size of the sliding rod 76 is provided on the side wall of the mounting block 4, and the sliding rod 76 is movably connected with a steel ball 77 at the end of the built-in groove 24. When the auxiliary mechanism 7 is in use, the second rotating seat 73 is rotated by a "cross"-shaped screwdriver, and the second rotating The seat 73 will drive the connecting sleeve 75 to rotate, the connecting sleeve 75 will drive the screw 71 to rotate, and the screw 71 will drive the conical block 72 to move vertically on the surface of the sleeve 62 until the surface of the conical block 72 abuts against the end of the slide rod 76, and the slide rod 76 is forced to move through the through hole to press against the end of the blade 3, so that the blade 3 will not shake, the stability of the milling process of the blade 3 is improved, and the milling fineness is improved. Since the conical block 72 is installed on the sleeve 62, and the sleeve 62 needs to drive the first conical block 72 to rotate, the conical block 72 also needs to rotate with the sleeve 62. In order to facilitate the rotation, there will be no large resistance between the conical block 72 and the slide rod 76. A steel ball 77 is set at the end of the slide rod 76 to reduce friction by rolling and improve the practicality of the structure.

[0047] Specifically, a spring piece 74 is fixedly installed on the top of the second rotating seat 73, and a second limiting protrusion 731 is arranged in a circular array at the bottom of the second rotating seat 73. The bottom wall of the circular groove 69 is provided with a second limiting groove that matches the size of the second limiting protrusion 731. The conical block 72 needs to be kept in a fixed position after being driven by the screw 71, so that it can have a good tightening effect during the milling cutter processing. At this time, a spring piece 74 is arranged on the second rotating seat 73, and the second rotating seat 73 and the screw 71 are slidably connected by a connecting sleeve 75. Therefore, the second rotating seat 73 can move in the vertical direction inside the circular groove 69. When the screwdriver is pressed against the second rotating seat 73 When the second rotating seat 73 is in the "cross" shape, pressure is applied to it, so that the second rotating seat 73 is forced to move upward, so that the second limiting protrusion 731 at the bottom of the second rotating seat 73 is disengaged from the second limiting groove on the bottom wall of the circular groove 69, so that it can be rotated. When the rotation is completed, that is, the conical block 72 has reached the appropriate position, the squeezing force on the second rotating seat 73 is released. The second rotating seat 73 moves downward under the action of the spring piece 74, so that the second limiting protrusion 731 is stuck in the second limiting groove, and then the second rotating seat 73 cannot rotate relative to the first rotating seat 63. Therefore, the effect of self-locking and tightening the blade 3 can be achieved without affecting the driving mechanism 6.

[0048] Specifically, a vertical hole is opened at the center position of the conical block 72, and a "cross"-shaped connecting rod is fixedly installed inside the vertical hole. The screw 71 threadedly penetrates the connecting rod, and a vertical groove matching the size of the connecting rod is opened on the surface of the sleeve 62 to achieve a state in which the conical block 72 moves vertically on the surface of the sleeve 62 under the drive of the screw 71.

[0049] Specifically, a reserved groove 43 is provided on the side wall of the limiting block 42, and a through hole 45 is provided on the side wall of the mounting block 4. A trapezoidal block 8 is fixedly installed inside the accommodating groove 22. The trapezoidal block 8 and the through hole 45 are of the same height and have matching sizes. The inclined surface of the trapezoidal block 8 faces upward so that when the trapezoidal block 8 passes through the through hole 45 and is inserted into the reserved groove 43, the limiting block 42 can be pushed upward. The blade 3 is inserted on the mounting block 4. When the blade 3 needs to be disassembled, the driving mechanism 6 can be used to move the mounting block 4 to the outermost side. At this time, the trapezoidal block 8 will be inserted into the through hole 45 and the inclined surface of the trapezoidal block 8 itself and the reserved groove 43 of the limiting block 42 will cooperate with each other, so as to push the limiting block 42 upward, so that the limiting block 42 compresses the tower spring 41 and moves to the inside of the mounting hole 44. At this time, the limiting groove 31 at the top of the blade 3 will not be restricted by the limiting block 42, and can be directly When the blade 3 is taken out, if the blade 3 is stuck on the mounting block 4, the conical block 72 in the auxiliary mechanism 7 can be used to support the sliding rod 76, so that the sliding rod 76 applies a thrust to the end of the blade 3 from the inside of the mounting block 4, thereby making it easier to remove the blade 3 without damaging the blade 3. Similarly, when installing the blade 3, the limiting block 42 will also be in the mounting hole 44 under the force of the trapezoidal block 8, so that the blade 3 can be directly inserted into the inside of the mounting block 4. After the mounting block 4 drives the blade 3 away from the trapezoidal block 8, the limiting block 42 will move downward under the action of the tower spring 41 and be stuck in the limiting groove 31 to engage the blade 3. Finally, the sliding rod 76 in the auxiliary mechanism 7 is used to tighten it, thereby achieving a tightening effect, preventing the blade 3 from being installed in the mounting block 4. The internal space is deformed due to long-term use, which in turn causes the blade 3 to shake, thereby improving functionality.

[0050] Specifically, a positioning hole matching the size of the sleeve 62 is provided at the bottom center of the upper tool holder 1. By providing the positioning hole on the upper tool holder 1, the sleeve 62 can be more stable after the upper tool holder 1 is installed.

[0051] In summary, during use, the blade 3 is inserted into the mounting block 4 for fixing, and then the mounting block 4 is driven to move inside the accommodating groove 22 by rotating the screw rod 67 in the driving mechanism 6, so that the position of the mounting block 4 in the lower blade seat 2 can be adjusted, thereby achieving the purpose of synchronously adjusting the position of the blade 3 to adapt to different use environments. At the same time, the sliding rod 76 in the auxiliary mechanism 7 can be used to press the blade 3 against the mounting block 4, which can assist the blade 3 in being fastened and installed, thereby improving the stability of the blade 3 after installation. The blade seat is divided into an upper blade seat 1 and a lower blade seat 2. After disassembling the upper blade seat 1, the internal environment of the lower blade seat 2 can be directly exposed, which is convenient for maintenance operations.

[0052] The upper knife seat 1 and the lower knife seat 2 can be connected by first using the cooperation between the positioning block 11 and the positioning groove 21, and then fastened by the bolt 12 and the threaded hole. A sleeve rod connected to the tool rod is provided at the top of the upper knife seat 1. After the tool rod transmits the torque to the upper knife seat 1, the upper knife seat 1 can use the positioning block 11 to transmit the torque to the lower knife seat 2, so as to avoid the situation where the bolt 12 is damaged or inconvenient to disassemble due to the force.

[0053] When installing the blade 3, the driving mechanism 6 is first used to move the mounting block 4 to the outermost side, and then the blade 3 is inserted into the slot of the mounting block 4, and then the limiting block 42 in the slot is stuck in the limiting groove 31 at the top of the blade 3. The limiting block 42 can be stably limited inside the limiting groove 31 by using the tower spring 41, so that the blade 3 and the mounting block 4 are fixed, and then the position of the blade 3 can be adjusted when the position of the mounting block 4 is adjusted.

[0054] When the driving mechanism 6 is in use, the hexagonal sleeve 62 is first inserted into the circular hole 25 of the lower blade seat 2, and then inserted into the hexagonal groove 68 through the circular hole 25, and then the hexagonal sleeve 62 is rotated, the hexagonal sleeve 62 will drive the hexagonal sleeve block 631 and the first rotating seat 63 to rotate, the first rotating seat 63 will drive the sleeve 62 to rotate, the sleeve 62 will drive the first bevel gear 61 to rotate, the first bevel gear 61 drives the four second bevel gears 66 to rotate, thereby driving the four screw rods 67 to rotate, and then driving the four mounting blocks 4 to move synchronously, so as to achieve the purpose of adjusting the position of the blade 3.

[0055] A first limiting ring 64 is arranged inside the hexagonal groove 68, so that when the hexagonal sleeve 62 is inserted into the hexagonal groove 68, the first limiting ring 64 will be squeezed, so that the first limiting ring 64 is forced to move, so that the first limiting protrusion 641 on the first limiting ring 64 is disengaged from the first limiting groove, so that the first rotating seat 63 can rotate. When the screw rod 67 is not needed to rotate, that is, when the mounting block 4 and the blade 3 need to be kept in a fixed position, the first limiting ring 64 will be located at the bottom of the hexagonal groove 68 under the action of the spring 65, so that the first limiting protrusion 641 at the bottom of the first limiting ring 64 is inserted into the first limiting groove on the surface of the placement groove 23, so that the first rotating seat 63 is restricted in the placement groove 23 by the first limiting protrusion 641 and the first limiting ring 64, so that it cannot rotate easily, thereby achieving the purpose of self-locking, so that the screw rod 67 will not rotate, so that the mounting block 4 is kept in a fixed position, and the stability of the cutting process of the blade 3 is improved.

[0056] When the second rotating seat 73 is rotated by a "cross" screwdriver, the second rotating seat 73 will drive the connecting sleeve 75 to rotate, and the connecting sleeve 75 will drive the screw 71 to rotate, and the screw 71 will drive the conical block 72 to move vertically on the surface of the sleeve 62 until the surface of the conical block 72 abuts against the end of the slide rod 76, and the slide rod 76 is forced to move through the through hole to press against the end of the blade 3, so that the blade 3 will not shake, thereby improving the stability of the milling process of the blade 3 and improving the milling precision. Since the conical block 72 is installed on the sleeve 62, and the sleeve 62 needs to drive the first conical block 72 to rotate, the conical block 72 also needs to rotate with the sleeve 62. In order to facilitate the rotation without generating a large resistance between the conical block 72 and the slide rod 76, a steel ball 77 is provided at the end of the slide rod 76 to reduce friction by rolling and improve the practicality of the structure.

[0057] The second swivel seat 73 is fixed with the screw rod 71 to the locking cam 76, and the locking cam 76 is locked to the locking cam 76. The locking cam 76 is locked with the screw rod 71 to lock the second swivel seat 73.

[0058] The blade 3 is inserted into the mounting block 4. When the blade 3 needs to be disassembled, the driving mechanism 6 can be used to move the mounting block 4 to the outermost side. At this time, the trapezoidal block 8 will be inserted into the through hole 45 and the inclined surface of the trapezoidal block 8 and the reserved groove 43 of the limiting block 42 will cooperate with each other, so as to push the limiting block 42 upward, so that the limiting block 42 compresses the tower spring 41 and moves to the inside of the mounting hole 44. At this time, the limiting groove 31 at the top of the blade 3 will not be restricted by the limiting block 42, so the blade 3 can be directly taken out. If the blade 3 is stuck on the mounting block 4, the conical block 72 in the auxiliary mechanism 7 can be used to support the sliding rod 76, so that the sliding rod 76 can be pushed against the end of the blade 3 from the inside of the mounting block 4. The blade 3 is then locked in the locking cam 42 and the locking cam 43 is engaged with the locking cam 44. The locking cam 43 is engaged with the locking cam 46 and the locking cam 47 is engaged with the locking cam 48. The locking cam 43 is engaged with the locking cam 46 and the locking cam 47 is engaged with the locking cam 48.

[0059] By providing a positioning hole on the upper tool holder 1 , the sleeve 62 can be made more stable after the upper tool holder 1 is installed.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An adjustable end milling cutter, comprising a cutter seat and a blade (3), characterized in that: The knife seat comprises an upper knife seat (1) and a lower knife seat (2), and the blade (3) is arranged inside the lower knife seat (2); A mounting block (4), wherein four receiving grooves (22) are arranged in a circumferential array at the bottom of the lower blade seat (2), the mounting block (4) is arranged inside the receiving groove (22), and the blade (3) is connected to the lower blade seat (2) via the mounting block (4); A driving mechanism (6), wherein a built-in groove (24) is provided at the inner center position of the lower knife seat (2), and the driving mechanism (6) is arranged inside the built-in groove (24). The driving mechanism (6) comprises a screw rod (67), and the screw rod (67) is rotatably connected to the inside of four receiving grooves (22), and the screw rod (67) is threadedly penetrated through the mounting block (4), and the mounting block (4) and the receiving groove (22) are slidably connected; An auxiliary mechanism (7), the auxiliary mechanism (7) being disposed in the lower knife seat (2); the auxiliary mechanism (7) comprising a slide rod (76), the slide rod (76) being arranged in a circular array inside the lower knife seat (2) and being slidably connected to the lower knife seat (2), and the two ends of the slide rod (76) being respectively inserted into the interior of the built-in groove (24) and the interior of the accommodating groove (22); A positioning block (11) is fixedly mounted on the bottom of the upper knife seat (1), a bolt (12) is provided on the surface of the upper knife seat (1) at a position relative to the positioning block (11), and a positioning groove (21) and a threaded hole are provided on the top of the lower knife seat (2) at a position relative to the positioning block (11); The side wall of the mounting block (4) is provided with a slot, the blade (3) is inserted into the slot, the top wall of the slot is provided with a mounting hole (44), the top of the blade (3) is provided with a limiting groove (31), the inside of the mounting hole (44) is slidably connected with a limiting block (42) whose size matches that of the limiting groove (31), the top wall of the mounting hole (44) is fixedly mounted with a tower spring (41), and the bottom end of the tower spring (41) is fixedly connected to the limiting block (42); The driving mechanism (6) further comprises four second bevel gears (66), the four second bevel gears (66) being respectively fixedly mounted on one end of the screw rod (67) close to the built-in groove (24); a sleeve (62) is arranged inside the built-in groove (24); a first bevel gear (61) is fixedly mounted on the top of the sleeve (62); the first bevel gear (61) and the second bevel gear (66) are meshed; a first rotating seat (63) is fixedly mounted on the bottom end of the sleeve (62); a hexagonal groove (68) is provided at the bottom of the first rotating seat (63); a hexagonal sleeve block (631) is fixedly mounted inside the hexagonal groove (68); and a circular hole (25) is provided at the center position of the bottom of the lower knife seat (2).

2. The adjustable end mill according to claim 1, characterized in that: A first limiting ring (64) is arranged inside the hexagonal groove (68), a spring (65) is fixedly installed on the top of the first limiting ring (64), the top of the spring (65) is fixedly connected to the hexagonal groove (68), a first limiting protrusion (641) is installed in a circumferential array at the bottom of the first limiting ring (64), the inside of the hexagonal groove (68) is arranged in a circular structure, and the circular diameter is larger than the size of the hexagonal groove (68), the first limiting protrusion (641) slides through the bottom of the hexagonal groove (68), a placement groove (23) is opened at the bottom center of the built-in groove (24), the first rotating seat (63) is arranged inside the placement groove (23), and a first limiting groove matching the size of the first limiting protrusion (641) is opened in a circumferential array on the surface of the placement groove (23), and the inner wall of the first limiting ring (64) is fitted with the hexagonal sleeve (631).

3. The adjustable end mill according to claim 2, characterized in that: The auxiliary mechanism (7) further comprises a conical block (72), the conical block (72) being slidably sleeved on the surface of the sleeve (62), the sleeve (62) being rotatably connected with a screw rod (71) inside, the screw rod (71) threadedly penetrating the conical block (72), the first rotating seat (63) being provided with a circular groove (69) inside, the circular groove (69) being provided with a second rotating seat (73), the top of the second rotating seat (73) being fixedly provided with a connecting sleeve (75), the connecting sleeve (75) being movably penetrating the top of the circular groove (69), the connecting sleeve (75) and the screw rod (71) being slidably connected, the bottom of the second rotating seat (73) being provided with a "cross" shaped blade edge, the side wall of the mounting block (4) being provided with a through hole matching the size of the sliding rod (76), the end of the sliding rod (76) being located in the built-in groove (24) being movably connected with a steel ball (77).

4. The adjustable end mill according to claim 3, characterized in that: A spring sheet (74) is fixedly mounted on the top of the second rotating seat (73), a second limiting protrusion (731) is arranged in a circular array at the bottom of the second rotating seat (73), and a second limiting groove having a size matching that of the second limiting protrusion (731) is formed on the bottom wall of the circular groove (69).

5. The adjustable end mill according to claim 4, characterized in that: A vertical hole is provided at the center of the conical block (72), a cross-shaped connecting rod is fixedly installed inside the vertical hole, the screw rod (71) is threadedly penetrated through the connecting rod, and a vertical groove matching the size of the connecting rod is provided on the surface of the sleeve (62) so that the conical block (72) can move vertically on the surface of the sleeve (62) under the drive of the screw rod (71).

6. The adjustable end mill according to claim 5, characterized in that: A reserved groove (43) is formed on the side wall of the limiting block (42), a through hole (45) is formed on the side wall of the mounting block (4), a trapezoidal block (8) is fixedly mounted inside the accommodating groove (22), the trapezoidal block (8) and the through hole (45) are of equal height and have matching sizes, and the inclined surface of the trapezoidal block (8) faces upwards so that the limiting block (42) is pushed upwards when the trapezoidal block (8) passes through the through hole (45) and is inserted into the reserved groove (43).

7. The adjustable end mill according to claim 1, characterized in that: A positioning hole matching the size of the sleeve (62) is provided at the center of the bottom of the upper knife seat (1).

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